Wv Commercial Septic System
Installer Exam Questions And Correct
Answers.
All tanks must have: - Answer 2 compartments
All tanks whether pre-manufactured or constructed on site shall be constructed so that the
length is ___________ compared to the width. - Answer at least one and one- half (1 1/2)
times... "to the width."
Septic Tanks may be made of: - Answer Concrete, Plastic, fiberglass, or other materials as
approved by the department.
Tank compartment partitions will be located: - Answer Not less than two-thirds or more than
three-fourths the Length of the tank from the Inlet end.
Compartment partitions will be constructed so a pass-thru hole or slot equal to or greater than
the diameter of the inlet pipe is positioned below the liquid surface with a
_____________________________. - Answer Minimum 25% to a maximum of 50% of the
total liquid depth.
Total liquid depth for larger poured-in-place tanks shall have a maximum of
______________inches - Answer 66 inches
True or False: Walls and bottom of poured-in-place septic tanks must be reinforced. - Answer
True
How can a Septic tank be reinforced? - Answer six inch by 6 inch (6"x6") No.10 gage welded
steel reinforcing wire OR fibrous reinforcing material conforming to ASTM specifications for such
materials.
How must Tank Lids be Reinforced? - Answer using three-eights steel reinforcing rods (rebar)
which shall be spaced twelve inches (12") on center each way extending a minimum of two and
one half (2 1/2") inches and a maximum of three (3") from the outside edge of the tank lid.
, True or False: Walls, bottoms, and lids of poured-in-place septic tanks should have a minimum
thickness of four inches (4"). - Answer True
Tank lids shall be constructed in ______________________ pieces and shall have securable,
removable access openings located so that the inlet and outlet tees can be
________________________________. - Answer one or two,
readily accessed.
Access opening shall have a minimum of _________________ and maximum of
___________________ free space. - Answer Minimum: 15"
Maximum: 24"
Tanks with more than 12 inches of cover must extend access openings to within ______ inches
of the ground surface. - Answer 12
All tanks shall be equipped with ________________________________ rated or equivalent tees
at the inlet and outlet ends of the tank. - Answer Four inch (4") PVC, ASTM 3034
Tees shall be constructed so they extend into the liquid a minimum of ____________________
and a maximum of __________________ of the liquid depth of the tank. - Answer Min: 25%
Max: 50%
The invert of the outlet tee shall be located _______________ inches below the invert of the
inlet tee. - Answer two inches
__________________ tees shall be equipped with an approved effluent filter. - Answer Outlet
Concrete used for poured-in-place or pre-cast septic tanks shall have a minimum
________________________. - Answer 28 day compressive strength of 4000 pounds per
square inch.
When pouring concrete, care should be taken to assure such operations are not done during
freezing or other wise inclement periods because _________________________________. -
Answer it could damage the integrity of the finished product.
Installer Exam Questions And Correct
Answers.
All tanks must have: - Answer 2 compartments
All tanks whether pre-manufactured or constructed on site shall be constructed so that the
length is ___________ compared to the width. - Answer at least one and one- half (1 1/2)
times... "to the width."
Septic Tanks may be made of: - Answer Concrete, Plastic, fiberglass, or other materials as
approved by the department.
Tank compartment partitions will be located: - Answer Not less than two-thirds or more than
three-fourths the Length of the tank from the Inlet end.
Compartment partitions will be constructed so a pass-thru hole or slot equal to or greater than
the diameter of the inlet pipe is positioned below the liquid surface with a
_____________________________. - Answer Minimum 25% to a maximum of 50% of the
total liquid depth.
Total liquid depth for larger poured-in-place tanks shall have a maximum of
______________inches - Answer 66 inches
True or False: Walls and bottom of poured-in-place septic tanks must be reinforced. - Answer
True
How can a Septic tank be reinforced? - Answer six inch by 6 inch (6"x6") No.10 gage welded
steel reinforcing wire OR fibrous reinforcing material conforming to ASTM specifications for such
materials.
How must Tank Lids be Reinforced? - Answer using three-eights steel reinforcing rods (rebar)
which shall be spaced twelve inches (12") on center each way extending a minimum of two and
one half (2 1/2") inches and a maximum of three (3") from the outside edge of the tank lid.
, True or False: Walls, bottoms, and lids of poured-in-place septic tanks should have a minimum
thickness of four inches (4"). - Answer True
Tank lids shall be constructed in ______________________ pieces and shall have securable,
removable access openings located so that the inlet and outlet tees can be
________________________________. - Answer one or two,
readily accessed.
Access opening shall have a minimum of _________________ and maximum of
___________________ free space. - Answer Minimum: 15"
Maximum: 24"
Tanks with more than 12 inches of cover must extend access openings to within ______ inches
of the ground surface. - Answer 12
All tanks shall be equipped with ________________________________ rated or equivalent tees
at the inlet and outlet ends of the tank. - Answer Four inch (4") PVC, ASTM 3034
Tees shall be constructed so they extend into the liquid a minimum of ____________________
and a maximum of __________________ of the liquid depth of the tank. - Answer Min: 25%
Max: 50%
The invert of the outlet tee shall be located _______________ inches below the invert of the
inlet tee. - Answer two inches
__________________ tees shall be equipped with an approved effluent filter. - Answer Outlet
Concrete used for poured-in-place or pre-cast septic tanks shall have a minimum
________________________. - Answer 28 day compressive strength of 4000 pounds per
square inch.
When pouring concrete, care should be taken to assure such operations are not done during
freezing or other wise inclement periods because _________________________________. -
Answer it could damage the integrity of the finished product.
